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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_TEST_PAINT_OP_MATCHERS_H_
#define CC_TEST_PAINT_OP_MATCHERS_H_
#include <optional>
#include <ostream>
#include <sstream>
#include <string>
#include <type_traits>
#include <utility>
#include "base/memory/ref_counted.h"
#include "cc/paint/paint_op_buffer.h"
#include "cc/test/paint_op_helper.h"
#include "testing/gmock/include/gmock/gmock.h"
namespace cc {
// Matcher checking that a PaintOp is equal to a PaintOp constructed with the
// provided parameters.
// Example use:
// PaintOpBuffer buffer = ...;
// EXPECT_THAT(buffer,
// ElementsAre(PaintOpEq<SaveOp>(),
// PaintOpEq<SetMatrixOp>(SkM44::Scale(1, 2))));
template <typename OpT>
class PaintOpEq {
public:
using is_gtest_matcher = void;
template <typename... Args>
explicit PaintOpEq(Args&&... args)
: expected_op_(base::MakeRefCounted<base::RefCountedData<OpT>>(
std::in_place,
std::forward<Args>(args)...)) {}
bool MatchAndExplain(const PaintOp& op,
testing::MatchResultListener* listener) const {
if (!op.EqualsForTesting(expected_op_->data)) {
if (listener->IsInterested()) {
*listener->stream()
<< "\n Expected: " << PaintOpHelper::ToString(expected_op_->data)
<< "\n Actual: " << PaintOpHelper::ToString(op);
}
return false;
}
return true;
}
void DescribeTo(std::ostream* os) const {
*os << "is equal to " << PaintOpHelper::ToString(expected_op_->data);
}
void DescribeNegationTo(std::ostream* os) const {
*os << "isn't equal to " << PaintOpHelper::ToString(expected_op_->data);
}
private:
scoped_refptr<base::RefCountedData<OpT>> expected_op_;
};
// Matcher testing whether a PaintOp is of one or two specific types. The second
// template parameter is intended for lite-ops. For example, a line may be
// represented as either a DrawLineOp or DrawLineLiteOp.
//
// Example use:
// PaintOpBuffer buffer = ...;
// EXPECT_THAT(buffer,
// ElementsAre(PaintOpIs<SaveOp>(), PaintOpIs<SetMatrixOp>()));
template <typename OpT, typename OpU = OpT>
class PaintOpIs {
public:
using is_gtest_matcher = void;
bool MatchAndExplain(const PaintOp& op,
testing::MatchResultListener* listener) const {
if (op.GetType() != OpT::kType && op.GetType() != OpU::kType) {
if (listener->IsInterested()) {
if constexpr (std::is_same_v<OpT, OpU>) {
*listener->stream()
<< "Unexpected PaintOp type. Expected: "
<< PaintOpTypeToString(OpT::kType)
<< ", Actual: " << PaintOpTypeToString(op.GetType());
} else {
*listener->stream()
<< "Unexpected PaintOp type. Expected: "
<< PaintOpTypeToString(OpT::kType) << " or "
<< PaintOpTypeToString(OpU::kType)
<< ", Actual: " << PaintOpTypeToString(op.GetType());
}
}
return false;
}
if (op.GetType() == OpT::kType && !static_cast<const OpT&>(op).IsValid()) {
if (listener->IsInterested()) {
*listener->stream() << "PaintOp is not valid";
}
return false;
}
if (op.GetType() == OpU::kType && !static_cast<const OpU&>(op).IsValid()) {
if (listener->IsInterested()) {
*listener->stream() << "PaintOp is not valid";
}
return false;
}
return true;
}
void DescribeTo(std::ostream* os) const {
*os << "is a valid " << PaintOpTypeToString(OpT::kType) << " paint op";
}
void DescribeNegationTo(std::ostream* os) const {
*os << "isn't a valid " << PaintOpTypeToString(OpT::kType) << " paint op";
}
};
// Equality matcher for DrawRecordOp objects.
//
// Example use:
// PaintOpBuffer nested_buffer;
// nested_buffer.push<SaveOp>();
// nested_buffer.push<RestoreOp>();
//
// PaintOpBuffer parent_buffer;
// parent_buffer.push<DrawRecordOp>(nested_buffer.ReleaseAsRecord());
//
// EXPECT_THAT(parent_buffer.ReleaseAsRecord(),
// ElementsAre(DrawRecordOpEq(PaintOpEq<SaveOp>(),
// PaintOpEq<RestoreOp>())));
template <typename... Args>
testing::Matcher<PaintOp> DrawRecordOpEq(Args... args) {
return testing::AllOf(
PaintOpIs<DrawRecordOp>(),
testing::ResultOf(
[](const PaintOp& record) {
return static_cast<const DrawRecordOp&>(record).record;
},
testing::ElementsAre(args...)));
}
} // namespace cc
#endif // CC_TEST_PAINT_OP_MATCHERS_H_
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